#include "ourhdr.h"
#define BUFFSIZE 8192

int main(void) {
    int n;
    char buf[BUFFSIZE];
    while ((n= read(STDIN_FILENO, buf, BUFFSIZE)) > 0)
        if (write(STDOUT_FILENO, buf, n) != n) 
            err_sys("write error");
    if (n < 0)
        err_sys("read error");
    exit(0);
}
